The two most abundant gases in the atmosphere are select one:

a. water vapor and carbon dioxide.

b. nitrogen and water vapor.

c. nitrogen and oxygen.

d. oxygen and carbon dioxide. previous page

The density of magnesium is 1.7 g/cm3, and the density of iron is 7.9 g/cm3. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?

A bullet of mass 10 g is fired from a gun of mass 490 g. The bullet leaves the gun with a speed of 120 ms-1. Find the speed of recoil of the gun. A. 2.4 ms-1 B. 4.8 ms-1 C. 6.4 ms-1 D. 7.4 ms-1

2. Describe the steps involved, in order, when the sun's energy is converted to light from a street lamp via a solar cell.

Glacier and erosion in a sentence

Where was the cell theory discovered?

Which is most likely why many scientists reject the cold fusion theory? There is too much waste involved in the process. Cold fusion experiments have been conducted at room temperature only.

Why is the sunlight written above the arrow in the equation, rather than on either side of it?

What is the significance of molecular formula

What is the effect of adding a pre-made mix to alcohol?

The rate constant for the decomposition of n2o is 2.30 s-1. What is the half-life of the decomposition?